diff --git a/Assets/VRM10/Runtime/Components/VRM10Object/VRM10ObjectExpression.cs b/Assets/VRM10/Runtime/Components/VRM10Object/VRM10ObjectExpression.cs
index e9a99e213..ca4b8bc99 100644
--- a/Assets/VRM10/Runtime/Components/VRM10Object/VRM10ObjectExpression.cs
+++ b/Assets/VRM10/Runtime/Components/VRM10Object/VRM10ObjectExpression.cs
@@ -9,6 +9,8 @@ namespace UniVRM10
     [Serializable]
     public sealed class VRM10ObjectExpression
     {
+        public const string NEUTRAL_KEY = "Neutral";
+
         #region Preset
         [SerializeField, Header("Emotion")]
         public VRM10Expression Happy;
diff --git a/Assets/VRM10/Runtime/IO/Vrm10Importer.cs b/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
index 0468fd08a..82dcc4a3b 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
@@ -427,6 +427,14 @@ namespace UniVRM10
                     {
                         var key = ExpressionKey.CreateCustom(name);
                         var preset = ExpressionPreset.custom;
+                        if (preset == ExpressionPreset.custom && name == VRM10ObjectExpression.NEUTRAL_KEY)
+                        {
+                            // TODO:
+                            // 注意！JsonSchema の更新待ち？
+                            key = ExpressionKey.CreateFromPreset(ExpressionPreset.neutral);
+                            Debug.Log($"set neutral");
+                            preset = ExpressionPreset.neutral;
+                        }
                         var clip = GetOrLoadExpression(key.SubAssetKey, preset, expression);
                         if (clip != null)
                         {
diff --git a/Assets/VRM10/Runtime/Migration/MigrationVrm.cs b/Assets/VRM10/Runtime/Migration/MigrationVrm.cs
index 6bfe09f92..294ac93dd 100644
--- a/Assets/VRM10/Runtime/Migration/MigrationVrm.cs
+++ b/Assets/VRM10/Runtime/Migration/MigrationVrm.cs
@@ -10,8 +10,6 @@ namespace UniVRM10
     /// </summary>
     public static class MigrationVrm
     {
-        const string NEUTRAL_KEY = "Neutral";
-
         public static byte[] Migrate(byte[] src)
         {
             var data = new GlbBinaryParser(src, "migration").Parse();
@@ -101,7 +99,7 @@ namespace UniVRM10
                             case ExpressionPreset.neutral:
                                 // TODO: 仕様確定待ち
                                 // Presetに格上げするか、小文字にする
-                                vrm1.Expressions.Custom[NEUTRAL_KEY] = expression;
+                                vrm1.Expressions.Custom[VRM10ObjectExpression.NEUTRAL_KEY] = expression;
                                 break;
                             case ExpressionPreset.custom:
                                 if (vrm1.Expressions.Custom.ContainsKey(customName))